Oregon weather in May
May is one of the best months to visit Oregon: highs of 17°C (63°F) and about 79 mm (3.1 in) of rain on average. Nights average 7°C (45°F) and cloud cover 68% (NASA POWER, 2001–2025 averages). It is the 5th driest month of the year and the 5th warmest. Compared with April, it is warmer and drier; June brings highs of 21°C (69°F) and 55 mm (2.2 in) of rain.
Figures are long-term averages for Portland, the largest city in Oregon. See below for other places.
Is May a good time to visit Oregon?
best month Weather score 65/100.
Yes. May is one of the best months for weather in Oregon.
Does it rain a lot in Oregon in May?
Some rain is normal: about 79 mm (3.1 in) falls in an average May. It is the 5th driest month of the year.
How warm is Oregon in May?
Days average 17°C (63°F) and nights 7°C (45°F).
Oregon weather by month
| Month | High | Low | Rain | Cloud | Weather |
|---|---|---|---|---|---|
| January | 7°C (44°F) | 1°C (33°F) | 216 mm | 79% | least pleasant |
| February | 8°C (46°F) | 1°C (33°F) | 144 mm | 75% | least pleasant |
| March | 10°C (51°F) | 2°C (36°F) | 178 mm | 78% | least pleasant |
| April | 13°C (56°F) | 4°C (39°F) | 119 mm | 75% | fair |
| May | 17°C (63°F) | 7°C (45°F) | 79 mm | 68% | best |
| June | 21°C (69°F) | 9°C (49°F) | 55 mm | 62% | best |
| July | 26°C (79°F) | 12°C (53°F) | 11 mm | 39% | best |
| August | 28°C (82°F) | 12°C (53°F) | 20 mm | 40% | best |
| September | 23°C (74°F) | 10°C (49°F) | 57 mm | 47% | best |
| October | 16°C (61°F) | 6°C (43°F) | 137 mm | 63% | fair |
| November | 10°C (49°F) | 3°C (37°F) | 217 mm | 77% | least pleasant |
| December | 6°C (42°F) | 0°C (33°F) | 251 mm | 81% | least pleasant |
Sources: 2001–2025 monthly averages from NASA POWER (MERRA-2 reanalysis). Page updated . How we rate months
Weather across Oregon in May
Weather can differ a lot within Oregon: coasts, hills and mountains each have their own climate.
| Place | High | Low | Rain | Weather |
|---|---|---|---|---|
| Portland | 17°C (63°F) | 7°C (45°F) | 79 mm | best |
| Eugene | 17°C (62°F) | 7°C (44°F) | 75 mm | fair |
| Salem | 18°C (64°F) | 7°C (45°F) | 71 mm | best |
| Gresham | 17°C (63°F) | 7°C (45°F) | 79 mm | best |
| Hillsboro | 17°C (62°F) | 7°C (44°F) | 73 mm | best |
| Beaverton | 17°C (63°F) | 7°C (45°F) | 79 mm | best |
| Bend | 17°C (63°F) | 3°C (38°F) | 47 mm | fair |
| Medford | 18°C (65°F) | 6°C (43°F) | 54 mm | best |
| Springfield | 17°C (62°F) | 7°C (44°F) | 75 mm | fair |
| Corvallis | 17°C (63°F) | 7°C (44°F) | 80 mm | best |
| Albany | 17°C (63°F) | 7°C (44°F) | 80 mm | best |
| Tigard | 17°C (63°F) | 7°C (45°F) | 79 mm | best |